Function main

PyBasic/interpreter.py:46–245

(passedIn="")

    gc.threshold(gc.mem_free() // 4 + gc.mem_alloc())

def main(passedIn=""):

    banner = (
"""
     PPPP   Y   Y  BBBB    AAA    SSSS   I    CCC
     P   P   Y Y   B   B  A   A  S       I   C
     P   P   Y Y   B   B  A   A  S       I   C
     PPPP     Y    BBBB   AAAAA  SSSS    I   C
u  u P        Y    B   B  A   A      S   I   C
u  u P        Y    B   B  A   A      S   I   C
uuuu P        Y    BBBB   A   A  SSSS    I    CCC
                    microPyBasic
""")

    print(banner)

    lexer = Lexer()
    program = Program()

    fOpened = False
    #initialize and open temporary file
    tmpfile = open('_pybTmp.tmp','w+')
    infile = tmpfile

    if passedIn != "":
        infile = program.load(passedIn,tmpfile)
        program.execute(infile,tmpfile)

    # Continuously accept user input and act on it until
    # the user enters 'EXIT'
    while True:

        # kfw stmt = input_keyboard(': ')
        stmt = input(': ')

        try:
        #if True:
            tokenlist = lexer.tokenize(stmt)

            # Execute commands directly, otherwise
            # add program statements to the stored
            # BASIC program

            if len(tokenlist) > 0:

                # remove blank tokens
                i = 0
                iend = len(tokenlist)
                for _ in range(iend):
                    if i>0 and tokenlist[i].lexeme.strip() == "" and tokenlist[i].category != Token.STRING:
                        tokenlist.pop(i)
                    else:
                        i+=1

                # Exit the interpreter
                if tokenlist[0].category == Token.EXIT:
                    if fOpened:
                        infile.close()